Gas burner



NOV- 28, 1933- c. J. GlzAYsoN GAS BURNER Filed July l5, 193g @www Patented Nov. 28, 1933i UNITED STA'rlzs 1-1,37,474 GASUMERV Charles J. Grayson, Huntington, Va. Applicatibn Julyy 15f19'2. serial'Nb. 622,787 7'c1aims. (o1. 15s- 116) AThis invention relates toheating apparatus and more particularly to a gas heater and its burner construction. f

One ofthe objects of the .presentvinvention '5 is to provide a novel gas burner rconstruction which insures an adequate supply of 'secondary or surrounding air Vat the outlet ports ofv the burner to cause complete combustion ofthe gas. -Another object of the present invention is to provide a novel construction of gas burner which is so shaped as to vprovide uniformity of gas Velocity and pressure of the various burner ports w and to convert velocity into pressure at points along its length =so that an equal supplyof gas is provided at each outlet port of the burner, and an equal height of flame is produced throughout vthe length of the burner. f

Another object lis to provide for anincreased number of burner'openings orfports vin a generally tubular burner without increasing the length of the tubular burner and without reducing the space between the ports.

Another object ofthe present invention is'to provide a novel construction of burner andcasing for facilitating the assembly and mounting of the parts in position. i ,l

Still another object of the present invention is to provide a novelheater and burner construction which is-simple, compact, inexpensive to manufacture and eiiicient for the purpose intended. `v` These and other. objects Will'become 'more apparent from the following description'and draw- .ing in which like reference characters denote like parts throughout theseveral views. 'It is to be expressly understood, however,r that the drawing is for purposes of illustration only and not Aintended as a definition of the limits of the invention, reference being had for this purpose '40 to the appended claims. 1

In the drawing Figure 1 is a perspective view of the heater with the casing partly broken away to show the burner mounted in position. Y

Fig. 2 is a plan view `of the burner-construction shown in Figure 1. f

Fig. 3 is a side elevational View of the same vburner shown in Fig. 2.

. Fig. 4 is a cross-sectional view, in elevation taken on line 4- 4 of Fig.' 2. l v

'Fig. 5" is a vcross-sectional view in elevation taken on line 5'5 of Fig. 2. l

Fig. 6 is a cross-sectional view in elevation taken on line 6 6 of Fig. 2. I

j Fig. 7 is a plan view ofthe heater.'

`the gas which consists in making the burnerrunit,

Referring to the' drawing,1the burner' 17 comprises a' shelliof a generally elongated `'tubular shape having a pluralityV of outlet ports 37 on one side 'in aline parallel to thel axis of Ithe burner, and in accordance with the present vinvention is 60 provided withlaterally protruding enlargements 39 in itswallsatspaced points along 'itsa length whichenlarge or expandfthe bore-'of the tube at these points. At these enlargements a plurality of additionaloutlet ports 40 areprovided for in- 65 vcreasing theamountfof gas Whichcan baconsumed' by the burner and increasing the eiciency vof thel device as aheater without'increasinglthe length of the burner or decreasing the space between' the ports. Also these enlargements or 70 expansionsof thebore convert velocity` into press urey to provide uniformity. of pressurethroughout the length offtheburner 'andateach of theindividual ports,l soth'at the ports adjacentthe inlet f end ofthe burner 'are provided with thedesired 75y pressure. Without the yenlargements. 39 there is a tendency ofthegas suppliedto the burner 4with V.velocity topas's-bythe ports and thepressurein `the tube to graduallyf increase fron--the Linlet 'toward theopposite end.

' To further. equalize the: pressure throughout thelength of the' burner,.the:burner tube has a generally longitudinal 'decreasing taperfrom a vrpoint near the inlet end toward' the oppositel end which, together with the enlargements :39, mainf- S5 tain@ the pressure' and velocity inthe proper pro--v portions throughout the tube to produce a iiame of equal length at the various ports. :Thebore at either end'of the taper in the embodiment shown is of uniform cross-section for a portion of its 90 length adjacent the-extremities.

Besides the features above described, the present'invention also provides for the easy iiow of secondary'airt'oinsure a complete combustion `of as a whole,` of cross-sectional'stream line contour toward' the burner ports, the .cross section decreasing gradually toward the outlet ports., ,As more clearly shown inthe embodiment illustrated with Athe outlet ports .37 and 40 at the top, the 100 bottomof the burner is blunt with the greatest width of. the burnenboth in its generallyregular contour and at the enlargements, below the ceriter and adjacent'the bottom, and with the width gradually decreasing toward the top and theoutlet ports. Preferablyv ythe top and bottom .portions are ilat with flat converging sides between theplaneof greatest width and the top and with rounded' surfaces provided vbetweenthe flat bottom and rthis plane.; In'ithis manner,y when the 11,0

heated air and productsof combustion rise, due

to their temperature, the air flowing in will follow f the outside wall or contour of the burner and supply the air directly to the outlet ports avoiding any resistance to the flow of air, and preventing any voids or vacuum adjacent the outlet ports.

To facilitate the mounting, the burner 17 is provided with shoulders 18 and 19 adjacent the inlet end and forminga projecting extension 20 at the inlet end. These shoulders 18 and 19 are bored and tapped as at 21 and 22 for the reception of fastening screws. burner is provided with a boss 23, bored and tapped at 24, for receiving a supporting and fastening screw.

The casing 8 in which the burner is to be mounted is illustrated as of generally'rect-angularI shape'with rounded corners and having legs 9l provided with an aperture 13 similar to apertures V12, for'theinsertionl of a screw into the tapped bore. 24, all of the screws. b eing like that illustrated at. 25. With Washersfsuch as 26 between the casing andi the head of the screw. The casing is also providedlwith a small window 14 for purposes of lighting the burner and observingthe Ycondition ofthe flame, andiwitha flangedopening 15 normally closed by a coverl, whichjpro.- vides means, for attaching a; iiue or stoveV pipe Whenit `is desired to conductY the; products. of

y combustion from the room.

- In assembling Lthe burner. inthe casing, the. end

extension. 20. is rst inserted through the open bottomy ofthe. casing .and into theraperture 1-,1 until the shoulders 18 and 19 engage the inner side off the'casing Withthe tapped bores '21` and 221111 alignment with the, apertures, 12. The oppo- 1 vsite end of the burner isA then raised until the justment of the sleeve, a set-screw 33 being,V providedv for fastening the sleeve in` adjusted positappedend of 23..isaligned with the aperture 13 after which `the screws 25. with the washers. are inserted; andA screwed up tightly to nxthe, burner f its' assembled position. After theY parts have been; assembled asguard 27 is inserted in the open :bottom and held byany, suitable fastening means.

Wherrin. position, the extension 20 of' the burner projects outside` oiV the casing. andi-is formed with a plurality of slots, 29 on opopsiteL sides of v.the periphery. and extending through the wall, preferably made by a core'during ther casting operation. To provide for adjusting the amount ofY air supplied to the burner, asleeve 3011s posi.- tioned over thev extension 2 0 vwhich has opposed 'slots 31 inthe direction of they length ofV the burner for cooperating with vthe slotsA 29 and a transverse slot 32 for allowing av rotatable adtion. The outer end ofthe extension 20 of the burner is axially boredand' tapped as at 34 for receiving. the; nipple ofv a gas, Valve 35 adapted to :inject gas into the burner with a velocity.

In. the. embodiment shown, variations in; the dimension of;l the bore ofthetubular. burner occur only transversely orlaterally, the verticalfdimension of.: the borev being substantially uniform.

At the opposite end the` Having now described the invention, what is.

into pressure for insuring a uniform flow of thev gas'through all of the outlet ports.

. 2. A gas burner comprising a hollow elongated shell of generally tubular form having one end open and the other end closed, the bore ofthe shell generally decreasing in horizontal width from a point near the open end toward the closed end,b ut being enlarged at spaced. points along theshell by increases in thehorizontal width of the bore, said bore being of uniform. vertical height throughout, a plurality of outlet ports. extending through the wall of the shell on one side, and a valveV nipple extending into the open end ofthe shell in axial alignment with the shell for injecting gasinto the shell, the taperyof the shell and the bore enlargements being so constructed .and arranged a's to produce an equal-.how of gas through each ofthe outlet ports. r Y

3. A gas. burner comprising a hollow elongated shell of generally tubular` form, the bore of said shell being enlarged at spaced points along its length,. a pluralityof outlet ports in the'wall of the shell Vparallel to the axis .of theshell', Va plurality of outlet ports. in the shell at the enlargedV portions disposed in a line at right angles to the axis of' the shell and the first named ports,

yand al valve. nipple in axialalignment with the shell for injectinggas into theshelllwithv velocity, a portion of whichis transformed bysaid spaced bore enlargements along the shellV into vpressure for insuring allow of gas throughall. of theport's at equalized pressure.

4. A gas lburner Vcomprisinga hollow elongated shell of. generally tubular form openatfoneVv end and closed at the opposite-end' and decreasing in cross-,sectionalV area from apoint. nearthe open -end` towards the closed end, the bore of said-shell being enlarged at spaced points along its length,

`a. plurality of outlet portsin` the wallof the shell parallel toV thev axis'of the shell, aplurality of outlet portsV in the shell at the enlargedportions disposediin a line at right angles to y.the'axis of.' the shell'and the firstnamediports, anda Valve nipple extending intov theopen end of theshell -in axial. alignment with the shell for 'injecting gas. with velocity, the taper of: theshell andthe enlargements being so constructed and arranged as to produce an equal .flow of gas through each of the outletports. i j

5. A gasburner comprising a hollow elongated shell of generally tubular contour, having a; plurality ofk enlargements vat spaced points along'its length, extending at right angles to the axis of thev shell, said kenlargements forming wells: on

the interior of the shell. for'converting.l velocity into. pressure, afplurality of outlet ports in` the larged portions disposed. in a lineA at right angles to the axi-sbfftheshellv and therstnamedports, the shell having a stream line; contour with. the

greatest widthi spaced'from theycenter on-the' side opposite the outlet ports and of gradually diminishing cross-section toward the outlet ports, and a valve nipple in axial alignment with the shell for injecting gas into the shell With Velocity which is in part transformed at the spaced Wells along the shell into pressure whereby an equal heght of flame is produced throughout the length of the burner due to the enlargements or Wells, and complete combustion due to the stream line contour.

6. A gas burner comprising ahollow elongated shell of generally tubular form, the bore of the shell being enlarged at spaced points along the shell, a plurality of outlet ports extending through the wall of the shell on one side, and a Valve nipple in axial alignment with the shell for injecting gas inte the shell with ve1ocity,`a portion of which is transformed by said spaced bore enlargements along the shell into pressure for in-r suring a uniform flow of the gas through all of the outlet ports, said enlargements at spaced points along the shell being arranged in pairs intermediate the ends with single terminal enlargements.

'7. A gas burner comprising a hollow elongated shell of generally tubular form having one end open and the other end closed, the bore of the shell generally decreasingin cross-sectional area from a point near the open end toward the closed end, said bore being enlarged at spaced points along the shell, a plurality of outlet ports extending through the Wall of the shell on one side, and a Valve nipple extending into the open end of the shell in axial-alignment with the shell for injecting gas into the shell, the taper of the shell and the bore enlargements being so constructed and arranged as to produce an equall flow of gas through each of the outlet ports, theenlargements at spaced points along the shell beingarranged in pairs intermediate the ends with single terminal enlargements,the bore between the last pair of bore enlargements and the terminal bore enlargement at the smaller end being uniform.

.CHARLES J. GRAYSON. 

